/// <summary>
/// Initializes a new instance of a horizontal datum
/// </summary>
/// <param name="ellipsoid">Ellipsoid</param>
/// <param name="toWgs84">Parameters for a Bursa Wolf transformation into WGS84</param>
/// <param name="type">Datum type</param>
/// <param name="name">Name</param>
/// <param name="authority">Authority name</param>
/// <param name="code">Authority-specific identification code.</param>
/// <param name="alias">Alias</param>
/// <param name="abbreviation">Abbreviation</param>
/// <param name="remarks">Provider-supplied remarks</param>
internal HorizontalDatum(
IEllipsoid ellipsoid, Wgs84ConversionInfo toWgs84, DatumType type,
string name, string authority, long code, string alias, string remarks, string abbreviation)
: base(type, name, authority, code, alias, remarks, abbreviation)
{
_Ellipsoid = ellipsoid;
_Wgs84ConversionInfo = toWgs84;
}
/// <summary>
/// Checks whether the values of this instance is equal to the values of another instance.
/// Only parameters used for coordinate system are used for comparison.
/// Name, abbreviation, authority, alias and remarks are ignored in the comparison.
/// </summary>
/// <param name="obj"></param>
/// <returns>True if equal</returns>
public bool Equals(Wgs84ConversionInfo obj)
{
if (obj == null)
{
return(false);
}
return(obj.Dx == this.Dx && obj.Dy == this.Dy && obj.Dz == this.Dz &&
obj.Ex == this.Ex && obj.Ey == this.Ey && obj.Ez == this.Ez && obj.Ppm == this.Ppm);
}
/// <summary>
/// Creates <see cref="HorizontalDatum"/> from ellipsoid and Bursa-World parameters.
/// </summary>
/// <remarks>
/// Since this method contains a set of Bursa-Wolf parameters, the created
/// datum will always have a relationship to WGS84. If you wish to create a
/// horizontal datum that has no relationship with WGS84, then you can
/// either specify a <see cref="DatumType">horizontalDatumType</see> of <see cref="DatumType.HD_Other"/>, or create it via WKT.
/// </remarks>
/// <param name="name">Name of ellipsoid</param>
/// <param name="datumType">Type of datum</param>
/// <param name="ellipsoid">Ellipsoid</param>
/// <param name="toWgs84">Wgs84 conversion parameters</param>
/// <returns>Horizontal datum</returns>
public IHorizontalDatum CreateHorizontalDatum(string name, DatumType datumType, IEllipsoid ellipsoid, Wgs84ConversionInfo toWgs84)
{
if (String.IsNullOrEmpty(name))
{
throw new ArgumentException("Invalid name");
}
if (ellipsoid == null)
{
throw new ArgumentException("Ellipsoid was null");
}
return(new HorizontalDatum(ellipsoid, toWgs84, datumType, name, String.Empty, -1, String.Empty, String.Empty, String.Empty));
}